From patchwork Thu Jan 19 21:47:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 13108865 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EAE8CC6379F for ; Thu, 19 Jan 2023 22:11:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230084AbjASWLZ (ORCPT ); Thu, 19 Jan 2023 17:11:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229819AbjASWKv (ORCPT ); Thu, 19 Jan 2023 17:10:51 -0500 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BD73DA8E6; Thu, 19 Jan 2023 13:48:05 -0800 (PST) Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 30JKhe0C028026; Thu, 19 Jan 2023 21:47:56 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=pMM55Ju181dle18LqM06bzYA1IAzgBsYxm2Y3C5SHAc=; b=k6JtfgUDef8Smp4ok0b0tIAGSHLQqeveVg8znnorMvyWuPTQHWqDD50oi9DZdSzbjAc/ G1JeZSIZJwVbexbRCRVKChiPZDgjjYihNlBALz+PmHVnZlvoEKov0c8mR6lXzn95TQNW 7+ERdywroztL65DJwA7SE27ZGYtUlCM9vPyb7oM7d1GFC5s8spvjQqnX+tsucIWsZpqB wvibe3BLRDUyfJYqBZjCNkM4t14NWmv43QDKgi12uIEOq1yIpl2dmkzqOJONT7hRQqte urbn1FF8LoPddzJvQJwQ3QsZcfwPTWtVVaCdwM7l4EEujw6LuA+/Ssobo0mlDbe1yIHk HA== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3n6ya2tcfx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 19 Jan 2023 21:47:56 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 30JLltlu012606 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 19 Jan 2023 21:47:55 GMT Received: from hu-bjorande-lv.qualcomm.com (10.49.16.6) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Thu, 19 Jan 2023 13:47:55 -0800 From: Bjorn Andersson To: Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski CC: Andy Gross , Bjorn Andersson , Konrad Dybcio , , , Subject: [PATCH 2/4] regulator: Introduce Maxim MAX20411 Step-Down converter Date: Thu, 19 Jan 2023 13:47:47 -0800 Message-ID: <20230119214749.4048933-3-quic_bjorande@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230119214749.4048933-1-quic_bjorande@quicinc.com> References: <20230119214749.4048933-1-quic_bjorande@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 4yAtqMay91m6nqCd3DXsYqkubUMOrf0v X-Proofpoint-GUID: 4yAtqMay91m6nqCd3DXsYqkubUMOrf0v X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.122.1 definitions=2023-01-19_14,2023-01-19_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 mlxscore=0 priorityscore=1501 lowpriorityscore=0 suspectscore=0 impostorscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2301190183 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Bjorn Andersson Introduce a driver to control the Maxim MAX20411 family of high-efficiency, syncrhonous step-down converters. Signed-off-by: Bjorn Andersson Signed-off-by: Bjorn Andersson --- drivers/regulator/Kconfig | 8 ++ drivers/regulator/Makefile | 1 + drivers/regulator/max20411-regulator.c | 163 +++++++++++++++++++++++++ 3 files changed, 172 insertions(+) create mode 100644 drivers/regulator/max20411-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 820c9a0788e5..aae28d0a489c 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -655,6 +655,14 @@ config REGULATOR_MAX20086 protectorvia I2C bus. The regulator has 2 or 4 outputs depending on the device model. This driver is only capable to turn on/off them. +config REGULATOR_MAX20411 + tristate "Maxim MAX20411 High-Efficiency Single Step-Down Converter" + depends on I2C + select REGMAP_I2C + help + This driver controls the Maxim MAX20411 family of high-efficiency, + syncrhonous step-down converters. + config REGULATOR_MAX77686 tristate "Maxim 77686 regulator" depends on MFD_MAX77686 || COMPILE_TEST diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index b9f5eb35bf5f..ee383d8fc835 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -80,6 +80,7 @@ obj-$(CONFIG_REGULATOR_MAX8973) += max8973-regulator.o obj-$(CONFIG_REGULATOR_MAX8997) += max8997-regulator.o obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o obj-$(CONFIG_REGULATOR_MAX20086) += max20086-regulator.o +obj-$(CONFIG_REGULATOR_MAX20411) += max20411-regulator.o obj-$(CONFIG_REGULATOR_MAX77686) += max77686-regulator.o obj-$(CONFIG_REGULATOR_MAX77693) += max77693-regulator.o obj-$(CONFIG_REGULATOR_MAX77802) += max77802-regulator.o diff --git a/drivers/regulator/max20411-regulator.c b/drivers/regulator/max20411-regulator.c new file mode 100644 index 000000000000..a5139ddc7a84 --- /dev/null +++ b/drivers/regulator/max20411-regulator.c @@ -0,0 +1,163 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2021, The Linux Foundation. All rights reserved. + * Copyright (c) 2022, Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX20411_UV_STEP 6250 +#define MAX20411_BASE_UV 243750 +#define MAX20411_MIN_SEL 41 /* 0.5V */ +#define MAX20411_MAX_SEL 165 /* 1.275V */ +#define MAX20411_VID_OFFSET 0x7 +#define MAX20411_VID_MASK 0xff +#define MAX20411_SLEW_OFFSET 0x6 +#define MAX20411_SLEW_DVS_MASK 0xc +#define MAX20411_SLEW_SR_MASK 0x3 + +struct max20411 { + struct device *dev; + struct device_node *of_node; + struct regulator_desc desc; + struct regulator_dev *rdev; + struct regmap *regmap; +}; + +static const unsigned int max20411_slew_rates[] = { 13100, 6600, 3300, 1600 }; + +static int max20411_enable_time(struct regulator_dev *rdev) +{ + int voltage, rate, ret; + unsigned int val; + + /* get voltage */ + ret = regmap_read(rdev->regmap, rdev->desc->vsel_reg, &val); + if (ret) + return ret; + + val &= rdev->desc->vsel_mask; + voltage = regulator_list_voltage_linear(rdev, val); + + /* get rate */ + ret = regmap_read(rdev->regmap, MAX20411_SLEW_OFFSET, &val); + if (ret) + return ret; + + val = FIELD_GET(MAX20411_SLEW_SR_MASK, val); + rate = max20411_slew_rates[val]; + + return DIV_ROUND_UP(voltage, rate); +} + +static const struct regmap_config max20411_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0xe, +}; + +static const struct regulator_ops max20411_ops = { + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .list_voltage = regulator_list_voltage_linear, + .enable_time = max20411_enable_time, +}; + +static int max20411_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct regulator_init_data *init_data; + struct device *dev = &client->dev; + struct regulator_config cfg = {}; + struct regulator_desc *desc; + struct max20411 *max20411; + + max20411 = devm_kzalloc(dev, sizeof(*max20411), GFP_KERNEL); + if (!max20411) + return -ENOMEM; + + max20411->regmap = devm_regmap_init_i2c(client, &max20411_regmap_config); + if (IS_ERR(max20411->regmap)) { + dev_err(dev, "Failed to allocate regmap!\n"); + return PTR_ERR(max20411->regmap); + } + + max20411->dev = dev; + max20411->of_node = dev->of_node; + + init_data = of_get_regulator_init_data(max20411->dev, max20411->of_node, &max20411->desc); + if (!init_data) + return -ENODATA; + + desc = &max20411->desc; + + desc->ops = &max20411_ops; + desc->owner = THIS_MODULE; + desc->type = REGULATOR_VOLTAGE; + desc->supply_name = "vin"; + desc->name = "max20411"; + + /* + * voltage = 0.24375V + selector * 6.25mV + * with valid selector between 41 to 165 (0.5V to 1.275V) + */ + desc->min_uV = MAX20411_BASE_UV; + desc->uV_step = MAX20411_UV_STEP; + desc->linear_min_sel = MAX20411_MIN_SEL; + desc->n_voltages = MAX20411_MAX_SEL; + + desc->vsel_reg = MAX20411_VID_OFFSET; + desc->vsel_mask = MAX20411_VID_MASK; + + desc->ramp_reg = MAX20411_SLEW_OFFSET; + desc->ramp_mask = MAX20411_SLEW_DVS_MASK; + desc->ramp_delay_table = max20411_slew_rates; + desc->n_ramp_values = ARRAY_SIZE(max20411_slew_rates); + + cfg.dev = max20411->dev; + cfg.init_data = init_data; + cfg.of_node = max20411->of_node; + cfg.driver_data = max20411; + + cfg.ena_gpiod = gpiod_get(max20411->dev, "enable", GPIOD_ASIS); + if (IS_ERR(cfg.ena_gpiod)) + return dev_err_probe(dev, PTR_ERR(cfg.ena_gpiod), + "unable to acquire enable gpio\n"); + + max20411->rdev = devm_regulator_register(max20411->dev, desc, &cfg); + if (IS_ERR(max20411->rdev)) + dev_err(max20411->dev, "Failed to register regulator\n"); + + return PTR_ERR_OR_ZERO(max20411->rdev); +} + +static const struct of_device_id of_max20411_match_tbl[] = { + { .compatible = "maxim,max20411", }, + { }, +}; +MODULE_DEVICE_TABLE(of, of_max20411_match_tbl); + +static const struct i2c_device_id max20411_id[] = { + { "max20411", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, max20411_id); + +static struct i2c_driver max20411_i2c_driver = { + .driver = { + .name = "max20411", + .of_match_table = of_max20411_match_tbl, + }, + .probe = max20411_probe, + .id_table = max20411_id, +}; +module_i2c_driver(max20411_i2c_driver); + +MODULE_LICENSE("GPL");